Valve



c. c. LAURITSEN.y

VALVE.

APPLICATION FILED APR. 12. 1920.

Patented N ov. 22, 1921.

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- PE2/627%): m @722W UNITED STATES PATENT OFFICE.

CHARLES C. LAURITSEN, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO BODY &BLOWER COMPANY, 0F CLEVELAND, OI-IIO, A CORPORATION OF OHIO.

VALVE.

Speeicaticn of Letters Patent.

Application led April 12, 1920. Serial No. 373,301.

To all whom t may concern.' 4

Be it known that I, CHARLES C. LenmarsEN, a subject of King ot Denmark,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvements in Valves, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings.

This invention relates to an improved self-acting valve that is adaptedto automatically control the supply ot liquid to a tank, reservoir orthe like; and its objects are to provide a highly efficient device ofthis character, yet one that is simple ot construction; economical 'andconvenient of manufacture 5 is durable, obviating the need of pistonpacking; which acts with a cushioning etfect at the end of its stroke,avoiding injury to the valve seat by pounding; is positive oitoperation; is not likely to get outV ot order, and which lends itseltlreadily to various installations.

An embodiment of my invention through lwhich the -foregoing' objects areattained is illustrated in the drawing accompanying and toi-ming a parthereof, and wherein Figure 1 shows a section through the valve; andFigs, 2 and 3 installations thereof, the latter illustratingl amodification ot the valve.

Referring to the drawing bythe use of reference characters, 1 is thevalve casing that is divided into inlet and outlet compartments 2 and 3,respectively, by a partition '-1 containing a valve seat 5. The valveseat, in the present instance, is incorporated in a spider that isscrewed into an aperture of the partition and has a central guide Gspaced :from its rim by radial arms 7.

Operating within the guide 6 is the tubular stem 10 of a valve element11 involving thevalve disk 12 and piston 13.y The valve diskis shown ashaving a tapered seating portion corresponding in angle with thecooperating part ot the valve seat 5 and it is of lesser diameter thanthe opposed circular tace ot the piston 13 which is spaced a suitabledistance from the valve disk along the stern 11, the parts havingstrengthening ribs 14 disposed between them. The piston 13 operateswithin a cylinder 15 formed in the upper end ot the casing 1 and inaxial alinement with the valve seat. The outer end ot the cylinder isclosed byv a cover plate 16 that may be secured by any suitable means tothe casing. A passageway 18 is formed in a thickened portion ot the wallof cylinder 15 and communicates with the cylinder in the vicinity ot itsinner and outer ends, the outer end of the cylinder being shown as ,ofsomewhat greater diameterthan the portion within which the piston 13 isguided. It will be observed that the lower end of the passageway 18enters the cylinder immediately adjacent the latters inner end so thatthe passageway is uncovered upon a slight outward movement of the pistontrom its innermost position. And it may be explained, urther, that thepiston tits the cylinder loosely enough to permit ot a slight leakagepast the piston from the inlet chamber of the casing. l

A threaded boss 19, ontowhich a perforated cap 2O is screwed, projectsoutwardly beyond the circular wall ot the piston 13 and constitutes, ineffect, an extension ot stem 10; and confined within the cap formovement toward and trom its seat is an auxiliary or pilot valve 25having a stem V2G that is guided within the bore ot the tubular stein10, the stem 26 being fluted at 27 to avoid obstruction otlow throughthe bore of the former stem when valve 25 is lifted oit its seat.

Patented Nov. 22,1921.

A pipe 30 has oney ot its ends screwed i through a tapped hole in thewall of casing l opposite, and in axial alinement with, the cylinder 15,and stem 26 is shown as projecting into the pipe. The lower end ot' thepipe is threaded for the application of a cap 31,

equipped with a packing-gland 32 for preventing leakage about a rod 33that is guidedy through a hollow boss Se onto which the gland nut isthreaded. The rod 33 is connected to the pilot valve stem 26 through Y atube 35 which is slipped over the rod and stem and connected thereto bypins 37.

The rod 33 is pivoted to a lever 38 which has its tulcrum in the lowerend ot a link 39 that is swung from an arm L10 projecting from the sideof the cap 31. A float 41 is carried by the outer end ofthe lever 38. l

In Fig. 2 I have shown my improved valve in a pipe or conduit i2 whichsupplies liquid to a system including a iilter 113 and a tank dil, thetank having an outlet 45. The float mechanism is situated within thetank andl serves through its connection with the valve `13, lifts thevalve disk 12 from its seat. A

iiow of liquid is now established through conduit 42 and it continuesuntil the liquid level within the tank lll rises sufficiently to elevatethe float and draw downward on the Y rod 33, and parts connectedtherewith, and

seat the valve 25. Assoon as this valve is seated and the escape ofliquid from the cylinderl is cut off, the pressure, communicated to thecylinder from the inlet' chamber 2 through the passageway 18, builds uprapidly within the cylinder and forces the piston in a direction to seatthe' valve diskv l2. As the disk approaches its seat, the speed of thepiston is materially retarded by reason of its closing the inner end ofthe passageway 18 and making the further supply of liquid to' thecylinder 15 Vdependent upon the escape of the liquid-past the piston.This course being quite restricted and the passage of liquid there-Ithrough comparatively slow, the movement of the piston at this stage inits operation is correspondingly sluggish and as a consequence the valveis gently lowered to its seat.

From the foregoing description it will be obvious to those skilled inthe art that my invention is applicable to numerous situations, theinstallation just described being only one example of its use. AnothereX- ample, and one which allows of a slight change inthe valve design,is shown in F ig. 3. Here the float mechanism is situated within thereceiver 4:6 into which the conduit 42a discharges directly.Consequently there would be no object in preventing leakage from thevalve to the receiver, so that not only may the packing gland 32 beomitted, but a larger pipe 30a may be substituted for the lformer pipe'30, the valve casing communicating directly therethrough with thereceiver, obviating the needv of further pipe and converting, in thepresent instance, the valve casing l from a straight to an L connection.

Attention is particularly directed tothe manner in which the floatmechanism is connected to the casing l and to the stem of the auxiliaryor pilot valve 25. inasmuch as these connections are accomplishedthrough the use of standard pipe and tubing, represented herein by theelements '80 or 30a andV 35, it is evident that to alter the distancebetween the valve casing and iioat mechanism requires only thesubstitution of appropriate lengths of pipe and tubing, and these can bereadily obtained in any desired lengths, and threaded and perforated forthe purpose, with little trouble and at slight.V

expense. Y Having thus described my invention, what '1 claim is 1. In avalve of the character set forth,

Vthelcombination of a casing divided into an inlet and an outletcompartment by a partition having an opening surrounded by a valve seat,the casing involving a cylinder opening into the inlet compartment,there being a passageway through which the inlet compartmentcommunicates with the outer end of the cylinder when the hereinaftermentioned piston is at any but its innermost position, a piston withinthe cylinder, Va

valve element for cooperation with the valve seat and `havingl operativeconnection with the piston so as to move in unison therewith, the pistonhaving a greater area exposed to the inlet compartmentV than has thevalve p in unison therewith, the parts being so designed that when thevalveelemcnt is lon its seat, the piston closes the aforesaid passagewayfrom Vdirect communication with the inlet compartment, the piston havinga greater area exposed to theinlet compartment than'has the valveelement, andmeans governing the escape of fluid from the cylinder.

3. In a valve of the character set forth, the combination of a casingdivided into an inlet and an outlet compartment by a partition having anopening surrounded by a valve seat, the casing involving a cylinderopening into theinlet compartment, a piston within the cylinder, a valveelement for cof operation with the valve seat and having operativeconnection with the piston so as to move in unison therewith, the pistonhaving a greater area exposed to the inlet compartment than has thevalve element, there being a 'oy-pass through which the outer end of thecylinder communicates with the inlet compartment and which is closedfrom direct communication with the inlet compartment when the valveelement is on its seat, and means governing the escape of iiuid from thecylinder. Y

'4. In a valve of the character set forth,

the combination of a casing divided into an inlet and an outletcompartment by a partition having an opening surrounded by a valve seatand incorporating a cylinder that opens int-o the inlet compartment andis in axial alinement with the valve seat, a member `incorporating apiston that operates within the cylinder and a valve element forcoperation with the seat, the piston and valve element being connectedtogether and spaced apart by a tubular stem which opens beyond each thepiston and valve element, an auxiliary valve for closing the bore of thetubular stem and having a stein extending through said bore, the casinghaving an opening in its wall through which access may be had to thelast mentioned stem, a tubular extension applied to the casing inregister with said opening, a fitting applied to the opposite end of theextension, a rod guided within said fitting, a sleeve fitting over andconnecting the stem of the auxiliary valve and said rod, and floatmechanism operatively connected with the rod.

5. In a valve of the character set Jforth, the combination of a casingdivided into an inlet and an outlet compartment by a partition having anopening surrounded by a valve seat and incorporating a cylinder thatopens into the inlet compartment and is in axial alinement with thevalve seat, a member incorporating a piston that operates Within thecylinder and a valve element for coperation with the seat, the pistonand valve element being connected together and spaced apart by a tubularstem which opens beyond each the piston and valve element, an auxiliaryvalve for closing the bore ot' the tubular stem and having a stemextending through said bore, the casing having an opening in its wallthrough which access may be had to the last mentioned stem, a tubularextension applied to the casing in register with said opening, a fittingapplied to the opposite end oi the extension, a rod guided within saidfitting, a sleeve fitting over and connecting the stem of the auxiliaryvalve and said rod, and float mechanism carried by the fitting andoperatively connected with the rod.

6. ln a valve of the character set forth, the combination of a casingdivided into an inlet and an outlet compartment by a partition having anopening surrounded by a valve seat and involving a cylinder opening intothe inlet compartment in axial alinement with a valve seat, a memberincorporating a piston which operates within the cylinder and a valveelement for cooperation with the seat, the piston and the valve elementbeing connected and spaced apart by a tubular stem the bore whereofopens beyond each the piston and the valve element, the piston having agreater area exposed to the inlet compartment than has the valveelement, an auxiliary valve for closing the bore of the tubular stembeyond the piston and having itself a stem which extends through thebore of the tubular stem, the casing having an aperture in axialalinement with the cylinder and valve seat, a pipe having one of itsends fitted within the aperture of the casing, a cap applied to theopposite end of the pipe and having a guide opening, a rod reciprocablewithin said opening, means connecting the rod and the last mentionedvalve stem, a float lever suspended from the cap and having a partoperatively connected to the rod, and a float carried by the lever,there being means for supplying iuid to the cylinder.

7. n a device ot the character set forth, the combination of a valvecasing divided into an inlet and an outlet compartment, a main valvearranged to close communication between said compartments, meansactuated by fluid Jfrom the inlet compartment for closing the mainvalve, a pilot valve for releasing said fluid and allowing the mainvalve to open, a conduit communicatively connected with the outletcompartment and into which 'the outlet compartment may discharge, oatmechanism, and means extending throughout said conduit and operativelyconnecting the float mechanism with the pilot valve.

In testimony whereof, I hereunto aliix my signature.

CHARLES C. LAURITSEN.

